26. ---Do you ____ to be on duty?

　 ---Yes, I do it ____.

　 A. by turns; take turns　　　 B. in turn; to turns

　 C. take turns; by turns　　　 D. get turns; in turn

25. ---I’m sorry. I stepped outside for a smoke. I was very tired.

　 ---There’s no ____ for this while you are on duty.

　 A. reason　　　 B. excuse　　　　 C. cause　　　　 D. explanation

24. ---Are there any English story books for us students in the library?

　 ---There’re only a few, ____.

　 A. if any　　　　 B. if there　　　　 C. if some　　　　 D. if has

23. ---Would you like to go to the concert with me, Mary?

　 ---I have got no interest in it, ___ I have lots of work to do.

　 A. otherwise　　　　 B. besides　　　　 C. however　　　　 D. therefore

22. ---What were you doing when the telephone rang?

　 ---I ____ away my books and ___ to bed.

　 A. had just put; was going　　　　　 B. was just putting; going

　 C. had put; had gone　　　　　　　　 D. have just put; gone

21. ---There are so many things to learn today!

　 ---Don’t worry. You needn’t trouble ____ them all.

　 A. to remember　　 　B. remembering　　

　C. of remembering　　 D. remember

20. ---What made him so unhappy?

　 ---____ the ticket for the football match.

　 A. Having been lost　　　 B. Lost　　　　

C. Because of losing　 　　D. Losing

19. ---How about the price of these refrigerators?

　 ---They’re equal in price to if not cheaper than, ____ at the other stores.

　 A. others　　　　 B. it　　　　　 C. that　　　　 D. the others

18. ---Have you heard that Mary has been appointed Director of Department?

　 ---After working so hard for so many years, _____.

　 A. she surely welcome it　　　　　 B. she certainly deserves it

　 c. she is welcome to it　　　　　　 D. it’s good news

17. ---Do you understand what I said?

　 ---I didn’t ____ the last two words.

　 A. grasp　　　　 B. catch　　　　 C. seize　　　 　D. follow